<template>
	<section>
		<!--工具条-->
		<el-col :span="24" class="toolbar" style="padding-bottom: 0;">
			<el-form :inline="true" >
				<el-form-item>
					<el-input v-model="keyword" placeholder="请输入关键字"></el-input>
				</el-form-item>
				<el-form-item>
					<el-button type="primary" v-on:click="keywordQuery">查询</el-button>
				</el-form-item>
				<el-form-item>
					<el-button type="primary" @click="handleAdd">新增</el-button>
				</el-form-item>
			</el-form>
		</el-col>

		<!--列表-->
    <!--
      :data="menus"  - 列表数据 - 数组
      highlight-current-row - 当前行高亮
      v-loading="listLoading" - 加载框/忙等框
      @selection-change="selsChange" - 选项改变时触发
      style="width: 100%;" - 宽度
      :row-key="getRowKey"
      在使用 reserve-selection 功能与显示树形数据时，该属性是必填的
    -->
		<el-table :data="menus" highlight-current-row :row-key="getRowKey" v-loading="listLoading" @selection-change="selsChange" style="width: 100%;">
			<el-table-column type="selection" :reserve-selection="true" width="55">
			</el-table-column>
			<el-table-column type="index" width="60">
			</el-table-column>
			<el-table-column prop="name" label="名称" width="150">
			</el-table-column>
      <el-table-column label="父级菜单" width="120" >
        <template scope="scope">
          <span v-if="scope.row.parent" style="color: magenta">{{scope.row.parent.name}}</span>
          <span v-else style="color: gray"></span>
        </template>
      </el-table-column>
      <el-table-column prop="url" label="访问URL" width="200">
      </el-table-column>
      <el-table-column prop="component" label="组件路径" width="200">
      </el-table-column>
      <el-table-column prop="icon" label="图标" width="150">
      </el-table-column>
			<el-table-column prop="state" label="状态" width="150">
        <template scope="scope">
          <span v-if="scope.row.state == true" style="color: green">正常</span>
          <span v-else style="color: red">禁用</span>
        </template>
			</el-table-column>
			<el-table-column label="操作">
				<template scope="scope">
					<el-button size="small" @click="handlesave(scope.$index, scope.row)">编辑</el-button>
					<el-button type="danger" size="small" @click="handleDel(scope.$index, scope.row)">删除</el-button>
				</template>
			</el-table-column>
		</el-table>

		<!--工具条-->
    <!--
     :disabled="this.sels.length===0"
     @click="batchRemove"
     -->
		<el-col :span="24" class="toolbar">
			<el-button type="danger" @click="batchRemove" :disabled="this.sels.length===0">批量删除</el-button>
			<el-pagination layout="prev, pager, next" @current-change="handleCurrentChange"
                     :page-size="pageSize"
                     :total="totals"
                     :current-page="currentPage"
                     style="float:right;">
			</el-pagination>
		</el-col>

		<!--新增和修改对话框-->
    <!--
      :visible.sync="saveFormVisible" - 控制对话框是否显示，默认false不显示，点击按钮
      :close-on-click-modal="false" - 点击对话框外面不关闭
      label-width="80px" - 标题宽度
      :rules="saveFormRules" - 表单项验证
      ref="saveForm" - 表单验证 - 当前对话框的名称
     -->
		<el-dialog :title="title" :visible.sync="saveFormVisible" :close-on-click-modal="false">
			<el-form :model="saveForm" label-width="80px" :rules="saveFormRules" ref="saveForm">
        <el-form-item label="上级菜单">
          <!-- 级联框：
            :options="options" - 数据 - 无限极树- 集合
            label:'name' - 回显哪一个属性值
            value:'id' - 传值，将id传递给v-model="saveForm.parent_id"
           -->
          <el-cascader v-model="saveForm.parentId"
                       :options="menuTree"
                       :props="{checkStrictly: true, label:'name', value:'id'}"
                       clearable></el-cascader>
        </el-form-item>
        <el-form-item label="菜单名称" prop="name">
          <el-input v-model="saveForm.name" auto-complete="off"></el-input>
        </el-form-item>
        <el-form-item label="访问URL" prop="url">
          <el-input v-model="saveForm.url" auto-complete="off"></el-input>
        </el-form-item>
        <el-form-item label="组件路径" prop="component">
          <el-input v-model="saveForm.component" auto-complete="off"></el-input>
        </el-form-item>
        <el-form-item label="标识" prop="index">
          <el-input v-model="saveForm.index" auto-complete="off"></el-input>
        </el-form-item>
        <el-form-item label="图标" prop="icon">
          <el-input v-model="saveForm.icon" auto-complete="off"></el-input>
        </el-form-item>
        <el-form-item label="状态">
          <el-radio-group v-model="saveForm.state">
            <el-radio class="radio" :label="true">正常</el-radio>
            <el-radio class="radio" :label="false">禁用</el-radio>
          </el-radio-group>
        </el-form-item>
			</el-form>
			<div slot="footer" class="dialog-footer">
				<el-button @click.native="saveFormVisible = false">取消</el-button>
				<el-button type="primary" @click.native="saveSubmit" :loading="saveLoading">提交</el-button>
			</div>
		</el-dialog>
  </section>
</template>

<script>
	export default {
		data() {
			return {
			  // 1. 分页查询
        menus: [],     // 列表数据，回调函数中给它赋值
        totals: 0,           // 总数量
        pageSize: 10,         // 每页显示的条数
        currentPage:1,       // 当前页
        listLoading: false,  // 加载框

        // 2. 高级查询
        keyword: '',

        // 3. 批量删除
        sels: [], // 列表选中列

        // 4.添加和修改的数据
				saveFormVisible: false, // 编辑界面是否显示
				saveLoading: false,
        title: '',
        // 表单项规则
				saveFormRules: {
          name: [
						{ required: true, message: '请输入名称', trigger: 'blur' }
					],
          url: [
            { required: true, message: '请输入URL', trigger: 'blur' }
          ],
          component: [
            { required: true, message: '请输入组件路径', trigger: 'blur' }
          ],
          index: [
            { required: true, message: '请输入标识', trigger: 'blur' }
          ]
				},

				// 编辑界面数据
				saveForm: {
					id: null,
					name: '',
          component: '',
          url: '',
          icon: '',
          index: null,
          parentId: null,
          intro: '',
          state: true
				},

        // 6.保存菜单树
        menuTree: []
			}
		},
		methods: {
      // 1.获取菜单列表
      getMenus() {
        // 组装参数
        let paras = {
          pageSize: this.pageSize,
          currentPage: this.currentPage,
          keyword: this.keyword
        };
        // 显示加载框
        this.listLoading = true;
        // 使用axios发送分页请求
        this.$http.post("/menu", paras).then(result => {
          this.menus = result.data.data; // 显示分页数据
          this.totals = result.data.totals; // 计算分页栏
          this.listLoading = false;
        }).catch(result => {
          this.$message.error("系统繁忙，请稍后重试!!!");
        })
      },

      // 2. 分页查询
      handleCurrentChange(val) {
        this.currentPage  = val;
        this.getMenus();
      },

      // 3. 高级查询
      keywordQuery() {
        // 将当前页置为1，防止出现查询错误
        this.currentPage = 1;
        this.getMenus();
      },

      // 4. 删除
      handleDel: function (index, row) {
        // 确认框
        this.$confirm('确认删除该记录吗?', '提示', {
          type: 'warning'
        }).then(() => { // 点击确定走这里
          this.listLoading = true; // 显示加载框
          this.$http.delete("/menu/" + row.id).then(result=>{
            // 成功之后的处理
            if (result.data.success) {
              // 计算总页数 = 最后一页
              let totalPage = Math.ceil(this.totals/this.pageSize)
              // 如果当前页是最后一页(总页数)，而且是最后一条数据，并且不是第一页，让当前页=当前页-1
              if (this.currentPage == totalPage && (this.totals - 1) % this.pageSize == 0 && this.currentPage != 1) {
                this.currentPage = this.currentPage -1;
              }
              this.getMenus();
            } else {
              this.$message.error("系统繁忙，请稍后重试！！！【500】");
            }
            this.listLoading = false; // 关闭加载框
          }).catch(result=>{
            this.$message.error("系统繁忙，请稍后重试！！！【404】");
          })
        }).catch(() => { // 点击取消

        });
      },

      // 5. 选项改变的时候触发：参数时每一个选中的对象
      selsChange: function (sels) {
        this.sels = sels;
      },

      // 6. 批量删除
      batchRemove: function () {
        var ids = this.sels.map(item => item.id);
        this.$confirm('确认删除选中记录吗？', '提示', {
          type: 'warning'
        }).then(() => { // 点击确定走这里
          this.listLoading = true;
         this.$http.patch("/menu", ids).then(result=>{
           if (result.data.success) {
             this.currentPage = 1;
             this.getMenus();
           } else {
             this.$message.error("系统繁忙，请稍后重试！！！【500】");
           }
           this.listLoading = false;
         }).catch(result=>{
           this.$message.error("系统繁忙，请稍后重试！！！【404】");
         })
        }).catch(() => {
        });
      },

			// 点击编辑弹出对话框
			handlesave: function (index, row) {
        this.title = "编辑",
        // 将row的数据给到空的{},这样不会影响到其他数据使用
				this.saveForm = Object.assign({}, row);
        //加载菜单树
        this.getMenuTree();
        // 弹出对话框
        this.saveFormVisible = true;
			},

			// 显示新增弹出对话框
			handleAdd: function () {
        this.title = "新增",
				this.saveForm = {
          id: null,
          name: '',
          component: '',
          url: '',
          icon: '',
          index: null,
          parentId: null,
          intro: '',
          state: true
				};
        //加载菜单树
        this.getMenuTree();
        // 弹出对话框
        this.saveFormVisible = true;
			},

			// 新增和修改提交
			saveSubmit: function () {
        // 表单验证：只要有一个表单项验证不通过就会返回false，全部通过才会返回true
				this.$refs.saveForm.validate((valid) => { // ref="saveForm"
					if (valid) {
						this.$confirm('确认提交吗？', '提示', {}).then(() => {
							this.saveLoading = true;
              // 提交数据时上级菜单数据格式做处理：
              let parentId = this.saveForm.parentId;
              if (parentId && parentId.length == 0) {
                this.saveForm.parentId = null;
              }
              if (parentId && parentId.length > 0) {
                this.saveForm.parentId = parentId[parentId.length - 1]
              }
							this.$http.put("/menu", this.saveForm).then(result=>{
							  if (result.data.success) {
							    this.getMenus();
                } else {
                  this.$message.error("系统繁忙，请稍后重试！！！【500】");
                }
							  this.saveLoading = false
              }).catch(result=>{
                this.$message.error("系统繁忙，请稍后重试！！！【404】");
                this.saveLoading = false
              })
              // 关闭对话框
              this.saveFormVisible = false;
						});
					}
				});
			},

      getMenuTree() {
        this.$http.get("/menu/menuTree").then(result=>{
          this.menuTree = result.data;
        })
      },
      // 仅仅是用来区分每一个对象的唯一标识
      getRowKey(row){
        return row.id;
        // return row.sn; // 同上
      }
		},
		mounted() {
			this.getMenus();
		}
	}
</script>

<style></style>